Q 2 2 hemispherical domes are to be painted as shown If perimeter of the bases are 17 - Maths - Lines and Angles

Question

Q 2 2 hemispherical domes are to be painted as shown If perimeter
of the bases are 17 6 cm and 70 4 cm respectively Then find the
cost of painting at the rate of 210 per c m 2

Brijendra Pal · Accepted Answer

Dear Student,
Considering there are two dome , although figure is not correct so
assuming two dome and then providing solution

<img alt="" src=
"https://s3mn%20mnimgs%20com/img/shared/content_ck_images/ck_5a6f58c8e9c9a%20png"
style="width: 401px; height: 350px;">
Now cost of painting is 210 rupee per cm2so overall cost for this dome of circumference 17
6 cm = 49 28×210=Rs  10348
8Now for second dome 2πr=70
4 cmr = 70 4×72×22=11
2 cm so surface area of dome = 2πr2=2×227×11
2 ×11 2 =788
48 cm2so cost of painding this dome = 210×788
48=Rs  165580
8 so overall cost for both=165580
8 +  10348 8=Rs  175929 6

Q.2. 2 hemispherical domes are to be painted as shown. If perimeter of the bases are 17.6 cm and 70.4 cm respectively. Then find the cost of painting at the rate of 210 per c m 2 .

Q.2. 2 hemispherical domes are to be painted as shown. If perimeter of the bases are 17.6 cm and 70.4 cm respectively. Then find the cost of painting at the rate of 210 per $c m^{2}$ .